Added the desired topic names as arguments to the launch files.

config/640x480_30fps_config.yaml

-width: 640
+width: 640 
 height: 480
 frame_id: 'camera'
 video_mode: 'uncompressed'

config/delock_config.yaml

+width: 1920
+height: 1080
+frame_id: 'camera'
+video_mode: 'mjpeg'
+frame_rate: 15
+#timestamp_method: 'start'
+#auto_exposure: 3
+#auto_exposure_priority: 0
+#exposure_absolute: 0.9
+#auto_white_balance: 'False'
+#white_balance_temperature: 4000

config/devices/delock.yaml

+vendor: '0x090c'
+product: '0xf37d'
+serial: ""
+index: 0

config/devices/logitech_c270.yaml

-vendor: '0x046d'
-product: '0x0825'
+vendor: "0x046d" 
+product: "0x0825"
 serial: ""
 index: 0

launch/uvc_camera.launch

@@ -7,6 +7,8 @@
   <arg name="node_name" default="uvc_camera" />
   <arg name="output" default="log" />
   <arg name="launch_prefix" default="" />
+  <arg name="image_raw_topic" default="~/image_raw" />
+  <arg name="camera_info_topic" default="~/camera_info" />
 
   <node pkg="libuvc_camera" 
         type="camera_node" 
@@ -16,5 +18,7 @@
     <rosparam file="$(arg device_file)" command="load" />
     <rosparam file="$(arg format_file)" command="load" />
     <param name="camera_info_url" value="file://$(arg calib_file)" />
+    <remap from="image_raw" to="$(arg image_raw_topic)"/>
+    <remap from="camera_info" to="$(arg camera_info_topic)"/>
   </node>
 </launch>

launch/uvc_camera_test.launch

 <?xml version="1.0" encoding="UTF-8"?>
 <launch>
 
-  <arg name="device_file" default="$(find iri_uvc_camera_bringup)/config/devices/logitech_c300.yaml" />
+  <arg name="device_file" default="$(find iri_uvc_camera_bringup)/config/devices/delock.yaml" />
   <arg name="format_file" default="$(find iri_uvc_camera_bringup)/config/640x480_30fps_config.yaml" />
   <arg name="node_name" default="uvc_camera" />
   <arg name="output" default="log" />
@@ -21,6 +21,8 @@
     <arg name="node_name"  value="$(arg node_name)"/>
     <arg name="output"  value="$(arg output)"/>
     <arg name="launch_prefix"  value="$(arg launch_prefix)"/>
+    <arg name="image_raw_topic" value="/$(arg node_name)/image_raw" />
+    <arg name="camera_info_topic" value="/$(arg node_name)/camera_info" />
   </include>
 
   <node name="rviz"